pub trait FromBytes: Sized {
type Bytes: NumBytes + ?Sized;
// Required methods
fn from_be_bytes(bytes: &Self::Bytes) -> Self;
fn from_le_bytes(bytes: &Self::Bytes) -> Self;
// Provided method
fn from_ne_bytes(bytes: &Self::Bytes) -> Self { ... }
}Required Associated Types§
Required Methods§
Sourcefn from_be_bytes(bytes: &Self::Bytes) -> Self
fn from_be_bytes(bytes: &Self::Bytes) -> Self
Create a number from its representation as a byte array in big endian.
§Examples
use num_traits::FromBytes;
let value: u32 = FromBytes::from_be_bytes(&[0x12, 0x34, 0x56, 0x78]);
assert_eq!(value, 0x12345678);Sourcefn from_le_bytes(bytes: &Self::Bytes) -> Self
fn from_le_bytes(bytes: &Self::Bytes) -> Self
Create a number from its representation as a byte array in little endian.
§Examples
use num_traits::FromBytes;
let value: u32 = FromBytes::from_le_bytes(&[0x78, 0x56, 0x34, 0x12]);
assert_eq!(value, 0x12345678);Provided Methods§
Sourcefn from_ne_bytes(bytes: &Self::Bytes) -> Self
fn from_ne_bytes(bytes: &Self::Bytes) -> Self
Create a number from its memory representation as a byte array in native endianness.
As the target platform’s native endianness is used,
portable code likely wants to use from_be_bytes or from_le_bytes, as appropriate instead.
§Examples
use num_traits::FromBytes;
#[cfg(target_endian = "big")]
let bytes = [0x12, 0x34, 0x56, 0x78];
#[cfg(target_endian = "little")]
let bytes = [0x78, 0x56, 0x34, 0x12];
let value: u32 = FromBytes::from_ne_bytes(&bytes);
assert_eq!(value, 0x12345678)Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.